Culvert.



J. P.'DOLAN. GULVERT. APPLICATION FILED MAY 15, 1911.

1,002,653, Patented Sept. 5,1911.

l ra e r-9. ww' 7n 7 3M v sa-em n'nrrnn STATES PATENT oFFioE.

JAMES P. DOLAN, OF REVERE, MASSACHUSETTS, ASSIGNOR TO GEORGE A. SAGENDORPH, TRUSTEE. OF BROOKLINE, MASSACHUSETTS.

CULV'ERT.

Specification of Letters Patent.

Patented Sept. 5, 1911 Application filed May 15, 1911. Serial No. 627,098.

To all whom it may concern:

ie it known that l, JAMES P. Douxx, of ,ltevcre. in the county of Sufl'olk and State of .\lass:n-husetts. have invented certain new and useful improvements in ulverts. of which the following is a specification, reference being had to the accompanying drawings. forming part thereof.

This invention has reference to improve ments in culverts and particularly to improvements in culverts constructed of sheet metal.

()ne object of the invention is to so construct a sheet metal culvert that the assembling together of its parts or members is facilitated.

Another object of the invention is to inn prove the construction of sheet metal culverts having bottom members furnished with smooth channels.

Other objects of the invention will appear from the following description.

The invention consists" in the sheet metal culvert. hereinafter described and claimed.

Figure 1. represents a sectional view of a sheet metal culvert 'of this improved construction having a concave bottom section. l i'g. 2 represents a side elevation of the improved culvert. Fig. represents a sectional view along the culvert taken on line 3-3 Fig. 1. 'Fig. 4. represents a sectional view of a culvert showing a modified form of the improvemcnt.

Similar numerals of reference designate corresponding parts throughout.

in carrying this invention into practice one of the important objects sought to be accomplished isto protect the channel of the culvert from clogging by the inward washing of earth or gravel and another object is to facilitate the shipmentof the culverts and the assemblingv of their parts or members at the place at which the culverts are to be erected. To this end I provide a sheet metal culvert having two members or sections 5 and 7 of which the member 5 is segmental in cross section and has the inwardly curved lower'cdge portions 6, 6 while the, material of this member is transversely corrugated to increase its strength. The member 7 is preferably segmental in crosssection and has its edge portions bent back upon themselves to form the outwardly inclined flanges 8, 8 and inventimi.

then again outward to form the abutments or lips 9, 9 for the edges of the member 6.

The constructionshown in Fig. l is similar to that above described exceptthat the lower or channel member has the flat bottom 10.

The space between the edges 6, 6 of the culvert section 5 is preferably such that these edges (3-6 frictionally engage the flanges 8, 8 of lower section 7 when said section 7 is slid lengthwise between said edges 6, 6 whereby said culvert sections are sufficiently secured together for installation. As such assembling of the culvert sections does not require the use of tools, the culvert sections 5 and 7 may be shipped as separate pa'ckages and may be readily assembled at the place of installation as described above.

In the mamifacture of culverts from sheetmetal, particularly when the upper section is transversely corrugated it is usually preferable for reasons of economical 1nanutacture and shipment to make such corrugated sections of conn'mratively short length and, where the upper and lower culvert sections are permanently secured together the length of the upper section determines the length of the lower section in which, of course, joints are objectionable. In this improved con struction the lowersections may be manu- I dieated in Fig. 2 of the drawing said lower sections may be long enough to acconnnodate more than one top section. Several of the lower sections 7, 7 may be nested together for shipment whereby shipment thereof is facilitated while the several sections 7, 7 s0 packed protect one another from injury.

Where it is desired to prepare. and ship the culvert entire it is of course obvious that the culvert sections may be permanently secured together by any well known fastening means which is not herein shown as such fastening means forms no part of the present It is obvious that when the space between the ends (3, (l is sulliciently wide, relative to the distance between the' outer surfaces of the flanges 8, 8 of the section 7 tlie ends (3, G will not 'l'rictionally engage such flanges S, 8 but said ends 6, (3 will be supported on the lips 9, 9 of section 7 and the langes 8, 8 will Patent 1 Y a channe p I -Having thus described my invention, I

claim asnew and desire to secure by Letters 1. A culvert comprising two sections of which one is segmental having inwardly ex-' tending edges, the other of said sections having outwardly inclined flanges extendin 10 within said first section and longitudina lips extending along the edges of said first section.

2. A oulvert comprisingtwo sheet metal extending edges, the lower section having a central channel and sides bent upon themselves and forming outwardly inclined flanges and lips extendin outward from the lower portions of said an located between the ed es 0 said upper section, substantially as escribed.

JAMES P. DOLAN. Witnesses:

R. N. BREMMER, H. J. MILLER.

es, said flanges 20 

